Question

1. what method is used to treat brain cancer by directing radiation at precise brain locations? cat scan alpha knife gamma knife pet scan 59) a pet scan is used to detect: electrical activity organ density glucose metabolism pulmonary congestion

Explanation:

1. Gamma - Knife is a radiosurgical technique that uses focused gamma - ray beams to treat brain tumors and other lesions by delivering radiation to precise brain locations. CAT scans and PET scans are imaging techniques, not treatment methods. There is no 'Alpha Knife' in common medical practice for this purpose.
2. A PET (Positron Emission Tomography) scan uses a radioactive tracer that is taken up by cells based on their metabolic activity. It is commonly used to detect glucose metabolism as cancer cells often have higher glucose uptake compared to normal cells. It does not detect electrical activity (EEG is for that), organ density (CT is better for density - related info), or pulmonary congestion primarily.

Answer:

1. C. Gamma Knife
2. C. glucose metabolism